Lock



C. PIKE..

LOCK.A APPucATxoN msn 58.21, 1920.

1,420,215. A Y rammed June 20, 1922.

tali STAY@ CHARLES PIKE, OF BROOKLYN, NEW YORK'.

LocK.

Application filed February 27, 1920. Serial No. 361,638.

To all lwhom t may concern.'

Be it known that I, CHARLES PIKE, citizen of the United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and .useful Improvements in Locks, of which the following is a specification.

This invention relates to locks, and has for its mainobject the provision of a novel lock which will be simple in construction and operation, and which at the same time will be proof against unwarranted manipulation.

The above and other objects will become apparent in the description below, in 'which characters of reference refer to like-named parts in the drawings, in which, briefly,

Fig. lis a view illustrative of the manner o'f attaching one type of lock to a door, said lock embodying one type of the invention.

Fig. 2 is a view oi the lock and the door frame partly in elevation and partly in section;

Fig. 3 is an end view taken substantially on the plane 3 3 of Fig. 2;

Fig. 4 is a plan view of my modilied form of latch;

Fig` 5 is a side view of the same,

Fig. 6 is a view illustrating the use of the recess 6 'for the passage of the latch 10 of the lock. An escutcheon plate or striking member7 4 covers the recess, in the jamb, the

plate or a casing having two slots 7 therein, separated by a bridge 7'. Upon the locking casing 3"L sector 16 is pivotally mounted at 30, that portion of said sector surrounding the pivot being circular and having a recess Yfor the entrance of a key therein as shown. T he sector is provided with teeth 18 sepa# rated by grooves 17, and a portion thereof is recessed as at 162 A substantially circular member 9 is pivotally mounted on the base adjacent the sector and is provided with pins 12a adapted to engage the grooves 17, the member 9 being held in position by a screw 8. A circular slot 11 is cut in the member 9 so as to provide a tongue-likeV one direction about its i 'pivot causes the circular, or latch, 10fto pass, out of the casing through the upper slot 7 and to continue and reenter the casing through the lower slot 7, thus securely holding or gripping the bridge-portion 7a of the plate 4; and reverse rotation of said sector will cause the latch 10 to recede into the casing of the lock 3, so that the door may be opened. A spring 20, is secured to a post 22, by curling its lower end 21 thereabout, and having its lower free end 21a in engagement with the lock wall 13. This spring, as shown, presses against the member 9, when the latter is in its locked position, presses against the straight edge 9a of the member 9, thus maintaining the latter in the locked position.

A lug 25 projectsV from the periphery of the pivotal portion of the lsector 16 and attached thereto by a screw, as shown.

Vthe spring 27 is bent so as to provide a cavity 27a. The object of this latter spring is to .urge the sector 16 to remain in which ever of its extreme positions it may happen to be situated in; as vshown in Fig. 2, the spring 27 urges the sector to remain in its position shown in heavy lines, by pressure upon the lug 25; and obviously', when the sector is in its other extreme position, as when the lock is closed, the spring 27 will also urge the vsector to remain inA the latter position.

vWhen applying the device to a mortise lock, the lug 25 is turned bythe key.

A pin 31 is provided on the member 9, near its outer periphery, adapted toengage the inner shoulder of the recess 16a when the latch is in its closed position, the objectbeing to limit the rotation o1' the sector 16 to an amount no greater than that which is necessary to allow the latch 10 to grip the bridge 7a. y

A dead lock as shown by the member 42, which is pivotally mounted at 43 to the base 3 and which is provided with a spring portion 14 in engagement with therwall 14a; it is apparent that thisspring 14 always urges the member 42 inward. The end of said member 42 is bentat substantially right angles, and is adapted to engage the recess 4() in the latch 10. A rounded rib or boss 24 projects inwardly from about the midpoint of said member 42, and is adapted to beengaged by the enlarged tooth 23 of the sector 16, in the following manner. As shown in heavy lines in Fig. 2, the lock is in its open position, and the end 41 of the member 42 engages the outer periphery of the latch 10; thus the lat-ch is iree to turn into its locked7 position. For the purpose of locking the latch from the inside, a handle 5, having a serrated periphery, is rigid to the sector pivot and extends through the casing. To lock the latch, then, said handle is turned so that the sector 16 (Fig. 2) moves in a clockwise direction. Thus the latch 10 passes tirst through the upper slot 7, into the recess G, and out again through the lower slot 7. When the latch has thus reached its farthest locking position, that is, when the pin 31 is stopped by the shoulder 1G, then the recess 40, in the latch 10, has arrived at the end of the inember 42, whence the pressure of the spring 14 forces said end 41 into the recess 40, thus providing a dead lock against forceable withdrawal of said latch. However, when the latch is to be opened by turning the handle 5, or by inserting a key into the pivotal member 30, the following occurs: the enlarged toothA 28 of the sector 16, being in the position shown dotted in F ig. 2, acts as a cam tolitt the boss 24 away from said latch and to disengage the end 41 of the member 42 from the recess 40, thereby allowing the latch 10 to pass into its lock position.

In Figs. 4, 5, and 6 l have shown a modiied form of latch, comprising a base mem ber 37 having a boss thereon, `and surrounded partway by a thin wall 36, enclosing a substantially arcuate passage 39. ln Fig. 6 will be seen one application oitl this form of latch, in which a pin or bolt 3S protrudes from the door frame in the wall, and is engaged by the latch 87 as clearly shown.

l claim:

1. A lock comprising a casing, a toothed sector pivotally mounted therein, a substantially circular member pivotally mounted therein adjacent said sector, an arcuate tongue projecting from the periphery of said circular member, pins on the face of said circular member adapted to be engaged by said toothed sector, a member pivotally and resiliently mounted in said casing and having a projecting end', a recess in the periphery of said circular member adapted to receive said end, said pivotally mounted member having means thereon adapted to be actuated by said toothed sector to lift said end from the recess, means adapted to hold said sector in either or' two positions, and a stop on said pivotally mounted member engageable with said sector when the tongue is t'ully extended.

2. A lock comprising a casing, a toothed sector pivotally mounted therein, a substantially circular member pivotally mounted therein adjacent said sector, an arcuate tongue projecting from the periphery of said circular member, pins on the Vtace of the latter adapted to be engaged by said toothed sector, a spring detent pivotally mounted in said casing and having a projecting end, a recess in the periphery of said circular member adapted to receive said end, said detent having a' rib thereon adapted to be actuated by said toothed sector to lift said end from said recess, said detent normally urged toward said circular member, and a spring urging said sector lto move said tongue into engaging position, said spring tensionally holding said sector in either of its extreme positions.

Signed at New York, in the county of New York and State of New York, this 27th day of Jan., A. D. 1920.

CHARLES PKE; 

